Provider.java

package com.github.devnied.emvnfccard.provider;

import java.io.IOException;

import android.nfc.tech.IsoDep;
import android.util.Log;

import com.github.devnied.emvnfccard.BuildConfig;
import com.github.devnied.emvnfccard.enums.SwEnum;
import com.github.devnied.emvnfccard.exception.CommunicationException;
import com.github.devnied.emvnfccard.parser.IProvider;
import com.github.devnied.emvnfccard.utils.TlvUtil;

import fr.devnied.bitlib.BytesUtils;

/**
 * Provider used to communicate with EMV card
 * 
 * @author Millau Julien
 * 
 */
public class Provider implements IProvider {

	/**
	 * TAG for logger
	 */
	private static final String TAG = Provider.class.getName();

	/**
	 * Logger
	 */
	private StringBuffer log = new StringBuffer();

	/**
	 * Tag comm
	 */
	private IsoDep mTagCom;

	@Override
	public byte[] transceive(final byte[] pCommand) throws CommunicationException {
		if (BuildConfig.DEBUG) {
			Log.d(TAG, "send: " + BytesUtils.bytesToString(pCommand));
		}
		log.append("=================<br/>");
		log.append("<font color='green'><b>send:</b> " + BytesUtils.bytesToString(pCommand)).append("</font><br/>");

		byte[] response = null;
		try {
			// send command to emv card
			response = mTagCom.transceive(pCommand);
		} catch (IOException e) {
			throw new CommunicationException(e.getMessage());
		}

		log.append("<font color='blue'><b>resp:</b> " + BytesUtils.bytesToString(response)).append("</font><br/>");
		Log.d(TAG, "resp: " + BytesUtils.bytesToString(response));
		try {
			Log.d(TAG, "resp: " + TlvUtil.prettyPrintAPDUResponse(response));
			SwEnum val = SwEnum.getSW(response);
			if (val != null) {
				Log.d(TAG, "resp: " + val.getDetail());
			}
			log.append("<pre>").append(TlvUtil.prettyPrintAPDUResponse(response).replace("\n", "<br/>").replace(" ", " "))
					.append("</pre><br/>");
		} catch (Exception e) {
		}

		return response;
	}

	/**
	 * Setter for the field mTagCom
	 * 
	 * @param mTagCom
	 *            the mTagCom to set
	 */
	public void setmTagCom(final IsoDep mTagCom) {
		this.mTagCom = mTagCom;
	}

	/**
	 * Method used to get the field log
	 * 
	 * @return the log
	 */
	public StringBuffer getLog() {
		return log;
	}

}